doing my maintance to day and when I plugged the pump back up nothing so after removal I found the impeller had a metal cover over the magnet and it was rusted up so I removed the cover and the pump started again but I figured it was a short timmer I don't know what type it is but it has gx-2400 on it and a pic of a clownfish maybe in front of a coral or something so I need suggestions on type and size I am just guessing but maybe around 600 gallons (10x turnover) looking for 1. quiet 2. durability and parts availability 3. wattage in that order thanx